十字环形交叉口的非对称信号控制

描述了十字环形交叉口左转二次控制方法的优化配时算法。和传统的环交口配时算法相比，文中所介绍的算法重新设计了信号控制结构和约束条件，赋予控制结构更大的灵活性以适应多变的，尤其是对向交通流量相差很大的不对称交通流。重新定义了全红时间，指出对向交通流不同时放行的可能性。给出了非对称信号控制的结构和定义完整的控制方案的参数。以通行能力、排队长度、周期协调等为约束，定义了可行解空间。引用已有研究的目标函数，在一个算例中给出了一个优于对称控制结构的配时方案。

Unsymmetrical Signal Control at Cross Roundabout

This paper described an algorithm of time assignment for optimizing the "left-turn with two stops" control method at a cross roundabout.The control structure and the corresponding constraints were upgraded in order to meet the varied,especially unsymmetrical traffic flows.The all-red time was redefined,and the possibility of the asymmetry was pointed out.The control structure,parameters and constraints were then presented.With the capacity,queue length,cycle coordination and so on as constrains,the feasible...